<template>
  <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on"
           label-position="left">
    <el-form-item prop="username">
      <el-input v-model="loginForm.username" type="text" auto-complete="off" placeholder="账号">
        <svg-icon slot="prefix" icon-class="user" class="el-input__icon input-icon"/>
      </el-input>
    </el-form-item>
    <el-form-item prop="password">
      <el-input v-model="loginForm.password" type="password" auto-complete="off" placeholder="密码"
                @keyup.enter.native="handleLogin">
        <svg-icon slot="prefix" icon-class="password" class="el-input__icon input-icon"/>
      </el-input>
    </el-form-item>
    <el-form-item prop="code">
      <el-input v-model="loginForm.code" auto-complete="off" placeholder="验证码" style="width: 60%"
                @keyup.enter.native="handleLogin">
        <svg-icon slot="prefix" icon-class="validCode" class="el-input__icon input-icon"/>
      </el-input>
      <div class="login-code">
        <img :src="codeUrl" @click="getCode">
      </div>
    </el-form-item>
    <el-form-item style="width:100%;">
      <el-button :loading="loading" size="medium" type="primary" style="width:100%;"
                 @click.native.prevent="handleLogin">
        <span v-if="!loading">登 录</span>
        <span v-else>登 录 中...</span>
      </el-button>
    </el-form-item>
  </el-form>
</template>

<script>

  import {getCodeImg} from '@/api/login'

  export default {
    name: 'Login',
    data() {
      return {

        codeUrl: '',
        loginForm: {
          username: '',
          password: '',
          key: '',
          grantType: 'captcha'
        },
        loginRules: {
          username: [{required: true, trigger: 'blur', message: '用户名不能为空'}],
          password: [{required: true, trigger: 'blur', message: '密码不能为空'}],
          code: [{required: true, trigger: 'change', message: '验证码不能为空'}]
        },
        loading: false,
        redirect: undefined
      }
    },
    watch: {
      $route: {
        handler: function (route) {
          this.redirect = route.query && route.query.redirect
        },
        immediate: true
      }
    },
    created() {
      this.getCode() //获取验证码
    },
    methods: {
      getCode() {
        getCodeImg().then(res => {
          this.codeUrl = res.data.codeUrl
          this.loginForm.key = res.data.key
        })
      },
      handleLogin() {
        this.$refs.loginForm.validate(valid => {
          if (valid) {
            this.loading = true
            this.$store.dispatch('user/loginByUserName', this.loginForm).then(() => {
              this.$router.push({path: this.redirect || '/'})
              this.loading = false
            }).catch(() => {
              this.loading = false
              this.getCode()
            })
          } else {
            console.log('error submit!!')
            return false
          }
        })
      }
    }
  }
</script>
